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| /************************************************************************** |
| * |
| * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /* Authors: Keith Whitwell <keith@tungstengraphics.com> |
| */ |
| |
| #ifndef SP_QUAD_H |
| #define SP_QUAD_H |
| |
| #include "pipe/p_state.h" |
| #include "tgsi/tgsi_exec.h" |
| |
| |
| #define QUAD_PRIM_POINT 1 |
| #define QUAD_PRIM_LINE 2 |
| #define QUAD_PRIM_TRI 3 |
| |
| |
| /* The rasterizer generates 2x2 quads of fragment and feeds them to |
| * the current fp_machine (see below). |
| * Remember that Y=0=top with Y increasing down the window. |
| */ |
| #define QUAD_TOP_LEFT 0 |
| #define QUAD_TOP_RIGHT 1 |
| #define QUAD_BOTTOM_LEFT 2 |
| #define QUAD_BOTTOM_RIGHT 3 |
| |
| #define MASK_TOP_LEFT (1 << QUAD_TOP_LEFT) |
| #define MASK_TOP_RIGHT (1 << QUAD_TOP_RIGHT) |
| #define MASK_BOTTOM_LEFT (1 << QUAD_BOTTOM_LEFT) |
| #define MASK_BOTTOM_RIGHT (1 << QUAD_BOTTOM_RIGHT) |
| #define MASK_ALL 0xf |
| |
| |
| /** |
| * Quad stage inputs (pos, coverage, front/back face, etc) |
| */ |
| struct quad_header_input |
| { |
| int x0, y0; /**< quad window pos, always even */ |
| float coverage[TGSI_QUAD_SIZE]; /**< fragment coverage for antialiasing */ |
| unsigned facing:1; /**< Front (0) or back (1) facing? */ |
| unsigned prim:2; /**< QUAD_PRIM_POINT, LINE, TRI */ |
| }; |
| |
| |
| /** |
| * Quad stage inputs/outputs. |
| */ |
| struct quad_header_inout |
| { |
| unsigned mask:4; |
| }; |
| |
| |
| /** |
| * Quad stage outputs (color & depth). |
| */ |
| struct quad_header_output |
| { |
| /** colors in SOA format (rrrr, gggg, bbbb, aaaa) */ |
| float color[PIPE_MAX_COLOR_BUFS][TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]; |
| float depth[TGSI_QUAD_SIZE]; |
| uint8_t stencil[TGSI_QUAD_SIZE]; |
| }; |
| |
| |
| /** |
| * Encodes everything we need to know about a 2x2 pixel block. Uses |
| * "Channel-Serial" or "SoA" layout. |
| */ |
| struct quad_header { |
| struct quad_header_input input; |
| struct quad_header_inout inout; |
| struct quad_header_output output; |
| |
| /* Redundant/duplicated: |
| */ |
| const struct tgsi_interp_coef *posCoef; |
| const struct tgsi_interp_coef *coef; |
| }; |
| |
| #endif /* SP_QUAD_H */ |